I really think you should read them again.
Since you brand Paul a liar then it follows that Peter was a liar as well.>>>>>>>>>>>
Not so at all, we are talking about a particular incident, Most of Pauls writings are real good, likely Peter did not read Galatians.
But there is more, much more that concerns me.
So Peter might have recommended Paul's teachings but he couldn't have known what Paul was teaching otherwise he would not have endorsed it.
And even though Peter and the other apostles met with Paul and confirmed that his wisdom and teachings were God given they must have been mistaken. Because they couldn't have said that given what Paul wrote even though that is exactly what they did say.
Pretzel logic.
None of Paul's writings were secret.